
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
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November 4th, 2015, 01:57 PM  #1 
Newbie Joined: Nov 2015 From: Rome, Italy Posts: 1 Thanks: 0  Quick Percentages and Divisions
Hi All I am new here, but I am pretty rusty with my math and need some help. I am trying to calculate quick % and also divisions. Here's a typical problem: I'd like to know how to quick get the % of 3.25/85? I've tried the long division route that's shown on maths tutorials, but I struggle when I have to deal with the 0.25. Also, once I have that answer (3.82%), what's the easiest way to do 1/3.82% (to get 26.2)? Thanks for your help; really appreciated! Last edited by skipjack; November 4th, 2015 at 06:24 PM. 
November 4th, 2015, 05:21 PM  #2 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038 
Why long division? Do you not have a calculator? 3.25/85 = .0382352.... That's a simple division. Where does the "percentage" come in? Percentages work along the lines of: 6% tax on purchase of 2000 ? 2000 * .06 = 120 
November 4th, 2015, 06:31 PM  #3 
Global Moderator Joined: Dec 2006 Posts: 20,917 Thanks: 2200 
3.25/85 = 0.65/17, which would make long division a bit easer, but it's still quicker to use a calculator (such as Google). Similarly, 17/0.65 = 340/13 = 26.15..., but why you would need to calculate this is unclear. 
November 5th, 2015, 12:15 AM  #4 
Senior Member Joined: Nov 2010 From: Indonesia Posts: 2,001 Thanks: 132 Math Focus: Trigonometry  If you're having a hard time dealing with 0.25, you can multiply both numerator and denominator by 100 so that the fraction becomes 325/8500, which still has the same value with the original fraction.


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